The bank is willing to buy dollars for 0.9 euros per dollar.
It is willing to sell dollars for .91 euros per dollar.
You can sell Australian dollars (A$) to the bank for $.72.
You can buy Australian dollars from the bank for $.74.
The bank is willing to buy Australian dollars (A$) for 0.68 euros per A$.
The bank is willing to sell Australian dollars (A$) for 0.70 euros per A$.
You have $100,000. Estimate your profit or loss if you were to attempt triangular arbitrage by converting your dollars to Australian dollars, and then convertubg Australian dollars to euros, and then converting euros to U.S. dollars.